Madison County

Formed 16 Feb 1810, 463 square milesParent county: Franklin

Evolution of county from date of formation until it assumed its final form1 Mar 1810: Erected and organized1 Mar 1818: Diminished by formation of Clark. Part of Champaign attached1 Apr 1820: Diminished by formation of Union. Part of Franklin attached4 Mar 1845: Madison-Franklin line altered